mirror of https://github.com/grpc/grpc-go.git
113 lines
3.6 KiB
Go
113 lines
3.6 KiB
Go
/*
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*
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* Copyright 2020 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// The server demonstrates how to use the credential reloading feature in
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// advancedtls to serve mTLS connections from the client.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"net"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/tls/certprovider/pemfile"
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"google.golang.org/grpc/keepalive"
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"google.golang.org/grpc/security/advancedtls"
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"google.golang.org/grpc/security/advancedtls/testdata"
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pb "google.golang.org/grpc/examples/helloworld/helloworld"
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)
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var port = ":50051"
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// Intervals that set to monitor the credential updates.
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const credRefreshingInterval = 1 * time.Minute
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type greeterServer struct {
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pb.UnimplementedGreeterServer
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}
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// sayHello is a simple implementation of the pb.GreeterServer SayHello method.
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func (greeterServer) SayHello(_ context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
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return &pb.HelloReply{Message: "Hello " + in.Name}, nil
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}
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func main() {
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flag.Parse()
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fmt.Printf("server starting on port %s...\n", port)
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identityOptions := pemfile.Options{
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CertFile: testdata.Path("server_cert_1.pem"),
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KeyFile: testdata.Path("server_key_1.pem"),
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RefreshDuration: credRefreshingInterval,
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}
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identityProvider, err := pemfile.NewProvider(identityOptions)
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if err != nil {
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log.Fatalf("pemfile.NewProvider(%v) failed: %v", identityOptions, err)
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}
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defer identityProvider.Close()
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rootOptions := pemfile.Options{
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RootFile: testdata.Path("server_trust_cert_1.pem"),
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RefreshDuration: credRefreshingInterval,
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}
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rootProvider, err := pemfile.NewProvider(rootOptions)
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if err != nil {
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log.Fatalf("pemfile.NewProvider(%v) failed: %v", rootOptions, err)
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}
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defer rootProvider.Close()
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// Start a server and create a client using advancedtls API with Provider.
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options := &advancedtls.Options{
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IdentityOptions: advancedtls.IdentityCertificateOptions{
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IdentityProvider: identityProvider,
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},
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RootOptions: advancedtls.RootCertificateOptions{
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RootProvider: rootProvider,
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},
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RequireClientCert: true,
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AdditionalPeerVerification: func(params *advancedtls.HandshakeVerificationInfo) (*advancedtls.PostHandshakeVerificationResults, error) {
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// This message is to show the certificate under the hood is actually reloaded.
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fmt.Printf("Client common name: %s.\n", params.Leaf.Subject.CommonName)
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return &advancedtls.PostHandshakeVerificationResults{}, nil
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},
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VerificationType: advancedtls.CertVerification,
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}
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serverTLSCreds, err := advancedtls.NewServerCreds(options)
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if err != nil {
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log.Fatalf("advancedtls.NewServerCreds(%v) failed: %v", options, err)
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}
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s := grpc.NewServer(grpc.Creds(serverTLSCreds), grpc.KeepaliveParams(keepalive.ServerParameters{
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// Set the max connection time to be 0.5 s to force the client to
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// re-establish the connection, and hence re-invoke the verification
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// callback.
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MaxConnectionAge: 500 * time.Millisecond,
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}))
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lis, err := net.Listen("tcp", port)
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if err != nil {
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log.Fatalf("failed to listen: %v", err)
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}
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pb.RegisterGreeterServer(s, greeterServer{})
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if err := s.Serve(lis); err != nil {
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log.Fatalf("failed to serve: %v", err)
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}
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}
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